package com.mjk.common.tools.gson.adapter.impl;

import com.google.gson.TypeAdapter;
import com.google.gson.internal.LinkedTreeMap;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class MapAdapterImpl extends TypeAdapter<Object> {


	@Override
	public void write(JsonWriter out, Object value) {
        // Do nothing
	}

	@Override
	public Object read(JsonReader in) throws IOException {
		JsonToken token = in.peek();
        switch (token) {
            case BEGIN_ARRAY:
                List<Object> list = new ArrayList<>();
                in.beginArray();
                while (in.hasNext()) {
                    list.add(read(in));
                }
                in.endArray();
                return list;
            case BEGIN_OBJECT:
                Map<String, Object> map = new LinkedTreeMap<>();
                in.beginObject();
                while (in.hasNext()) {
                    map.put(in.nextName(), read(in));
                }
                in.endObject();
                return map;
            case STRING:
                return in.nextString();
            case NUMBER:                  
                //改写数字的处理逻辑，将数字值分为整型与浮点型。                     
                double dbNum = in.nextDouble();
                // 数字超过long的最大值，返回浮点类型
                if (dbNum > Long.MAX_VALUE) {
                    return dbNum;
                }
                // 判断数字是否为整数值
                //long lngNum = (long) dbNum;
                return dbNum;
            case BOOLEAN:
                return in.nextBoolean();
            case NULL:
                in.nextNull();
                return null;
            default:
                throw new IllegalStateException();
        }
	}

}
